40590865 has 36 divisors (see below), whose sum is σ = 58980636. Its totient is φ = 26737536.

The previous prime is 40590857. The next prime is 40590871. The reversal of 40590865 is 56809504.

40590865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2989441 + 37601424 = 1729^2 + 6132^2 .

It is not a de Polignac number, because 40590865 - 2³ = 40590857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 205947 + ... + 206143.

It is an arithmetic number, because the mean of its divisors is an integer number (1638351).

Almost surely, 2^40590865 is an apocalyptic number.

It is an amenable number.

40590865 is a deficient number, since it is larger than the sum of its proper divisors (18389771).

40590865 is a wasteful number, since it uses less digits than its factorization.

40590865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 40590865 is about 6371.0960595489. The cubic root of 40590865 is about 343.6709067616.

The spelling of 40590865 in words is "forty million, five hundred ninety thousand, eight hundred sixty-five".